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The Goodman 0130F00038 Auxiliary Limit Switch (light-blue body) is a genuine OEM thermal safety switch for the Amana/Goodman AMH80703AXCA 80% AFUE gas furnace. This normally-closed limit opens the control circuit if it senses an over-temperature or flame-rollout condition, shutting the burners down to prevent heat-exchanger damage and unsafe operation.
OEM vs. Generic: Limit switches are calibrated to a specific trip temperature — indicated here by the light-blue housing. Installing the OEM 0130F00038 guarantees the exact factory trip point, so the furnace's safety logic behaves as certified. Substituting a generic switch with a different setpoint can cause nuisance trips or, worse, fail to protect the equipment.
Install Difficulty: Easy to Moderate. Two mounting screws and two push-on terminals. Shut off gas and power first. If a limit has tripped, always diagnose the root cause (dirty filter, blower fault, blocked flue) before returning the unit to service.
Restore safe operation with the genuine Goodman 0130F00038 auxiliary limit switch.